With this polypotentiostat one electrochemical cell can be equipped with 1, 2, 3 or 4 working electrodes and all of these will be measured parallel. The EmStat3 4WE consists of a standard EmStat3 potentiostat and additionally three bipotentiostat modules, thus all techniques an EmStat3 is capable of are available for the EmStat3 4WE.
Each potentiostat has eight current ranges: 1 nA to 10 mA with a resolution of 1 pA at the lowest current range and can automatically select the optimal current range.
A cell can be setup with one reference and one counter electrode or one combined reference and counter electrode.
The current is measured using a zero resistance ammeter (ZRA).
All supported techniques for EmStat3 4WE:
Voltammetric techniques
These methods can all be used in their stripping modes which are applied for (ultra-) trace analysis.
Technique as a function of time:
The additional WE’s can each individually be used in two different modes:
EmStat3 4WE | Main potentiostat | Polypotentiostat modules |
DC-potential range | ± 3.000 V | ± 3.000 V |
Compliance voltage | ± 5 V | ± 5 V |
DC-potential resolution | 0.1 mV | 0.1 mV |
Max. dc-offset error | 2 mV | 3 mV |
Potential accuracy | 0.2 % | 0.2 % |
Current ranges | 1 nA to 10 mA (8 ranges) | 1 nA to 10 mA (8 ranges) |
Maximum current | ± 20 mA typical and ± 15 mA minimum for the sum of WE1, W2, W3 and W4 | |
Current resolution | 0.1% of current range, 1 pA at lowest current range/td> | |
Electrometer amplifier input | > 100 GOhm // 4 pF | > 100 GOhm // 4 pF |
Rise time | approx. 100 μs | approx. 100 μs |
Housing:
Dimensions | 12 cm x 8.5 cm x 3,5 cm |
Weight | 250 g |
Power | 5 V external power supply (included) |
Interfacing | USB |
PC recommendations | Windows Vista, 7 and 8 (32 and 64 bit) Dual core processor with 2 GB RAM |
The current is measured using a zero resistance ammeter (ZRA).
PALM-ES3/4WE | PalmSens Emstat3 Polypotentiostat-3 with integrated Bipot modules for We |